Out-of-bounds Write Affecting glibc package, versions <2.27-4


Severity

Recommended
low

Based on Debian security rating

    Threat Intelligence

    EPSS
    0.06% (25th percentile)

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  • Snyk ID SNYK-DEBIAN11-GLIBC-517983
  • published 18 May 2018
  • disclosed 18 May 2018

How to fix?

Upgrade Debian:11 glibc to version 2.27-4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

An AVX-512-optimized implementation of the mempcpy function in the GNU C Library (aka glibc or libc6) 2.27 and earlier may write data beyond the target buffer, leading to a buffer overflow in __mempcpy_avx512_no_vzeroupper.

CVSS Scores

version 3.1
Expand this section

NVD

7.8 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High